AR450 Plate
AR450 plate offers an optimal combination of hardness and impact toughness, making it a popular choice for heavy equipment operating in harsh abrasive environments. The AR wear steel family includes multiple grades—ranging from AR200 to AR600—allowing engineers to choose the most suitable hardness based on abrasion severity and structural requirements.
For mining, quarrying, recycling and construction machinery, AR450 stands out as a versatile, high-performance wear-resistant solution.
- Description
AR450 plate is a high-strength quenched and tempered (Q&T) abrasion-resistant steel designed to provide excellent wear resistance and high impact strength in heavy-duty industrial environments. The “AR” designation stands for Abrasion Resistant Steel, and the number (such as 400, 450, 500) represents the nominal Brinell hardness level (HB).
AR steel plates are widely used in mining equipment, dump truck bodies, loaders, cutting edges, crushers, cement and aggregate machinery, and industrial wear components.
Common Grades of AR Wear-Resistant Steel
The AR series includes multiple hardness grades to fit different wear conditions:
| Grade | Nominal Hardness (HB) | Typical Use |
|---|---|---|
| AR200 / AR235 | 180–250 HB | Forming parts, light abrasion |
| AR360 / AR400 | 360–440 HB | General abrasion with moderate impact |
| AR450 | 420–480 HB | High abrasion & medium/high impact |
| AR500 | 480–550 HB | Extreme abrasion, limited impact |
| AR600 | 570–650 HB | Ultra-high abrasion, low impact |
Typical Chemical Composition of AR450 (Reference Range)
| Element | Typical Content (%) |
|---|---|
| Carbon (C) | 0.20–0.28 |
| Manganese (Mn) | 1.0–1.6 |
| Silicon (Si) | 0.20–0.50 |
| Chromium (Cr) | 0.40–1.20 |
| Nickel (Ni) | 0.20–1.0 |
| Molybdenum (Mo) | 0.20–0.60 |
| Boron (B) | ≤0.005 |
Exact composition may vary by manufacturer specification.
Mechanical Properties Comparison
| Property | AR400 | AR450 | AR500 |
|---|---|---|---|
| Hardness | 360–440 HB | 420–480 HB | 480–550 HB |
| Tensile Strength | 1250–1500 MPa | 1350–1650 MPa | 1400–1700 MPa |
| Yield Strength | 900–1200 MPa | 1100–1350 MPa | 1100–1400 MPa |
| Impact Resistance | High | Very High | Medium to High |
| Formability | Good | Moderate | Lower (prone to cracking) |
| Weldability | Controlled preheat required | Controlled | Controlled carefully |
Performance Characteristics of AR450 Plate
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Balanced hardness and toughness, ideal for high impact + high abrasion
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Long service life compared to AR400 under same conditions
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Good structural stability due to Q&T heat treatment
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Compatible with cutting, welding, bending and forming processes
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Crack resistance superior to AR500 under impact loading
Typical Applications of AR450 Plate
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Mining dump truck bodies & liners
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Loader, excavator and bulldozer bucket edges
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Crushing, screening and conveying machinery
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Shovel and dragline components
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Concrete mixer blades and cement plant parts
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Cutting edges and wear bars
Advantages of Using AR450 Over Other Grades
| Application Condition | Recommended Grade |
|---|---|
| High impact + moderate abrasion | AR450 |
| Sliding wear + low impact | AR500 / AR600 |
| Formable wear components | AR235 / AR360 / AR400 |
| Ultra-high erosion particles | AR600 or carbide composite plate |
